Inevitably, there’s some repetition--no fewer than 12 different attempts at “You’re Gonna Make Me Lonesome When You Go,” for example. What’s exhilarating is the chance to eavesdrop on the evolution of the songs as Dylan grasps, bit by bit, for the emotional center of each one.

Much of More Blood, More Tracks elicits an eerie feeling, a dramatic feedback loop of Dylan’s shifting self-image. It’s not uncommon for the Bootleg Series to leave breadcrumb trails for fans, yet hearing Dylan obsess over these songs about obsession creates an uncanny Synecdoche, New York effect.

Certainly, there is no small number of Dylan completists who will lap up every shred of tape he ever used. But there emerges a feeling of diminishing returns for anyone not cursed with OCD--obsessive-compulsive-Dylanism--during a stretch on the second disc with nine consecutive versions of “You’re Gonna Make Me Lonesome When You Go.” Likewise the eight takes of “Buckets of Rain” on the fourth disc that are interrupted just long enough for a pair of performances of “Up to Me.”